California Valleys Alphabetical Index
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California "O" Valleys
Additions and/or corrections to the database are encouraged! Simple Add/Edit Procedure.
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| Name | County | USGS Topo Map |
|---|---|---|
| Oak Canyon | Riverside | Palm View Peak |
| Oak Canyon | Ventura | Thousand Oaks |
| Oak Canyon | Ventura | Simi Valley East |
| Oak Canyon | Los Angeles | Val Verde |
| Oak Canyon | Santa Barbara | Surf |
| Oak Canyon | San Diego | La Mesa |
| Oak Canyon | Los Angeles | Glendora |
| Oak Canyon | Santa Barbara | Bald Mountain |
| Oak Canyon | Monterey | Cholame Valley |
| Oak Cove | Colusa | Wilbur Springs |
| Oak Creek Canyon | Kern | Monolith |
| Oak Flat Canyon | Fresno | Curry Mountain |
| Oak Flat Gulch | Tehama | Chickabally Mountain |
| Oak Grove Canyon | Monterey | Cholame Valley |
| Oak Grove Valley | San Diego | Aguanga |
| Oak Gulch | Siskiyou | Callahan |
| Oak Hill Canyon | Alameda | Hayward |
| Oak Ravine | Plumas | Caribou |
| Oak Spring Canyon | Los Angeles | Sunland |
| Oak Spring Canyon | Los Angeles | Mint Canyon |
| Oak Valley | San Diego | Descanso |
| Oakdale Canyon | Los Angeles | Newhall |
| Oakdale Canyon | Los Angeles | Burnt Peak |
| Oakgrove Canyon | Los Angeles | Burnt Peak |
| Oakwood Valley | Marin | San Rafael |
| Oat Canyon | Tulare | Frazier Valley |
| Oat Canyon | San Benito | Monarch Peak |
| Oat Gulch | Stanislaus | Crevison Peak |
| Oat Knob Canyon | Tulare | Woodlake |
| Oat Valley | Yolo | Zamora |
| O'Connell Gulch | Trinity | Hoosimbim Mountain |
| O'Conner Gulch | Mendocino | Dutchmans Knoll |
| O'Connor Gulch | El Dorado | Omo Ranch |
| Odessa Canyon | San Bernardino | Yermo |
| O'Farrill Gulch | Siskiyou | Youngs Peak |
| Ogilby Canyon | El Dorado | Riverton |
| Ogulin Canyon | Lake | Lower Lake |
| O'Hara Canyon | Ventura | Santa Paula |
| O'Harrel Canyon | Mono | Glass Mountain |
| Ohio Ravine | Plumas | Haskins Valley |
| Ohio Valley | Plumas | Canyondam |
| Oil Canyon | Contra Costa | Antioch South |
| Oil Canyon | Fresno | Coalinga |
| Oil Canyon | Kern | Tehachapi NE |
| Oil Canyon | Santa Barbara | Carpinteria |
| Oil Canyon | Santa Barbara | Lake Cachuma |
| Oil Well Canyon | San Luis Obispo | Lopez Mountain |
| Oil Well Canyon | Santa Barbara | Tranquillon Mountain |
| Oil Well Canyon | Fresno | Curry Mountain |
| Oil Well Canyon | Napa | Lake Berryessa |
| Oil Well Canyon | Napa | Lake Berryessa |
| Oiler Canyon | Kern | Oiler Peak |
| Ojai Valley | Ventura | Matilija |
| Ojeda Canyon | San Benito | Ruby Canyon |
| Old Canyon | San Luis Obispo | La Panza |
| Old Dairy Gulch | Santa Cruz | Santa Cruz |
| Old Gulch | Calaveras | Calaveritas |
| Old Man Canyon | Monterey | Cosio Knob |
| Old Man Canyon | Ventura | Old Man Mountain |
| Old Timer Canyon | San Bernardino | Onyx Peak |
| Old Topanga Canyon | Los Angeles | Topanga |
| Old Woman Canyon | Mendocino | Brushy Mountain |
| Old Woman Gulch | Calaveras | San Andreas |
| Olivas Canyon | San Benito | Topo Valley |
| Olive Canyon | Santa Barbara | Cuyama |
| Oliver Canyon | Los Angeles | Sunland |
| Olivera Canyon | Santa Barbara | Sisquoc |
| Olsen Canyon | Riverside | Lake Mathews |
| O'Neal Canyon | San Diego | Otay Mesa |
| O'Neil Canyon | Kern | Frazier Mountain |
| Onion Patch Gulch | Mendocino | Navarro |
| Onion Valley | Sierra | Sierraville |
| Onion Valley | Placer | Blue Canyon |
| Onion Valley | Calaveras | Tamarack |
| Opal Canyon | Inyo | Waucoba Spring |
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